Took a walk around my property this weekend and took a few shots of this flying critter. Can anyone tell me what type of bird this is?

Taken with a borrowed Sigma 70-200. It's my first time trying a lense with a decent zoom capability. I primarily use my 50mm 1.8, 60mm 2.8 Macro and my Sigma 10-20. I think I'm going to purchase the Canon 70-200L after using this. I love taking bird pics